Тест по Crude Oil Washing (CES v5.0)

Test results

Your result: 100%
Save to my resume
Return to test
Right answers:
1

According to IMO the Manual has to be approved by the Administration. With regard to general practice who is giving the final approval of the Manual?

Your answer is correct:

The classification society.
2

Are we allowed to perform COW at sea?

Your answer is correct:

Yes, between discharge ports.
3

From how many or which one of the cargo pumps must it be possible to take “bleed-off” from main(s) for COW supply?

Your answer is correct:

From any one of the cargo pumps.
4

How many percent of the cargo tanks to be crude oil washed on rotational basis for sludge control during a 4 months period?

Your answer is correct:

Approximately 25 %.
5

How to avoid excessive electrostatic generation in the washing process due to the presence of water in the crude oil washing fluid?

Your answer is correct:

By discharge at least 1 metre from the tank before use as a source of washing fluid.
6

How to avoid vapour emission during filling of departure ballast (non SBT vessel)?

Your answer is correct:

By simultaneous ballasting and cargo discharge.
7

Water, that is put into a tank, which has been crude oil washed but not water washed shall be regarded as:

Your answer is correct:

Dirty ballast.
8

What are the requirements regarding experience for persons, who are intended to have particular responsibilities as defined in the Manual?

Your answer is correct:

They shall have, at least, 6 months experience on oil tankers, where they should have been involved in COW operation.
9

What is IMO’s requirement regarding the oxygen level in the tank before and during it is crude oil washed?

Your answer is correct:

The oxygen level must not exceed 8 % by volume.
10

What is the difference between SBT-system and CBT-system?

Your answer is correct:

CBT-system can utilise cargo pumps/lines for ballast handling.
11

What is the dissolving effect dependent on?

Your answer is correct:

The type of oil.; The composition of the oil.; The temperature of the oil.
12

What is the maximum quantity of oil you are permitted to discharge into the sea from an “existing tanker”?

Your answer is correct:

1/15 000 of the total quantity of the cargo.
13

What is the minimum distance from the nearest land when you are pumping departure ballast overboard?

Your answer is correct:

50 nautical miles.
14

What is the purpose of the small diameter line?

Your answer is correct:

To discharge ashore the drainings form pumps and lines.
15

What is the requirement regarding arrangements for hand dipping the cargo tanks after COW?

Your answer is correct:

Arrangements in the aftermost portion of the tank and in 3 other suitable locations.
16

What is the requirement regarding capacity of inert gas plant?

Your answer is correct:

At least 125 % of the maximum discharge capacity.
17

What is the requirement regarding hydrant valves on the COW line?

Your answer is correct:

They must be blanked off.
18

What is the requirement regarding stripping system capacity when washing bottom of the cargo tanks?

Your answer is correct:

The stripping capacity must be 25 % more, than the total throughput of washing fluid.
19

What is the requirement to the number of drive units on vessels, equipped with tank washing machines, where the drive units are detachable?

Your answer is correct:

That no drive unit has to be shifted more than twice.
20

What kind of action must be taken in the event of total failure of the inert gas system during discharge/COW?

Your answer is correct:

Stop the discharge/COW.
21

What kind of action to be taken if an alternation affecting the crude oil washing system is made?

Your answer is correct:

Revise the Manual.
22

What requirements must the person in charge of COW operation meet with regard to the COW Manual?

Your answer is correct:

Be fully knowledgeable of the content of the Manual.
23

Where in the tank shall the oxygen level be determined before crude oil washing?

Your answer is correct:

1 metre from the deck and in the middle region of the ullage space.
24

Where shall the verification of submerged washing machines be recorded?

Your answer is correct:

In the Supplement 2 to the Oil Record Book.
25

Where should you record the crude oil washing after completion?

Your answer is correct:

Oil Record Book.
26

Who is signing the Ship/Shore Safety Checklist?

Your answer is correct:

Ship and Shore Representative.
27

Why is COW more efficient than water washing?

Your answer is correct:

Because of the dissolving property in crude.
28

Why was COW made compulsory?

Your answer is correct:

To reduce pollution.
Take the test againLink to results